343905 ÷ 72 
Our goal is to divide 343905 by 72.

On to step 1:
72 can be fit into 3 0 times, resulting in a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 72

On to step 2:
When dividing 34 by 72, we get 0 with a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 34, we end up with 34.
Append the next digit (3) from the dividend to 34 and continue with: 343 / 72

Moving on to step 3:
When dividing 343 by 72, we get 4 with a remainder of 55.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 288 from 343 to get 55.
Grab the next digit (9) from the dividend, add it to 55, then carry on: 559 / 72

On to step 4:
72 can be fit into 559 7 times, resulting in a remainder of 55.
Record the quotient 7 as the next digit in the result. 
Result so far: 47.0
Deduct 504 from 559 and we're left with 55.
Append the next digit (0) from the dividend to 55 and continue with: 550 / 72

Advancing to step 5:
The number 72 fits into 550 7 times, leaving a remainder of 46.
Use 7 as the next digit of our solution. 
Result so far: 477.0
Deduct 504 from 550 and we're left with 46.
Include the next digit (5) from the dividend after 46, then repeat: 465 / 72

Let's proceed to step 6:
When dividing 465 by 72, we get 6 with a remainder of 33.
Use 6 as the next digit of our solution. 
Result so far: 4776.0
Subtracting 432 from 465 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 7:
330 divided by 72 is 4 with a remainder of 42.
Use 4 as the next digit of our solution. 
Result so far: 4776.4
The remainder is 42 after subtracting 288 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
When dividing 420 by 72, we get 5 with a remainder of 60.
Record the quotient 5 as the next digit in the result. 
Result so far: 4776.45
Deduct 360 from 420 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 9:
The number 72 fits into 600 8 times, leaving a remainder of 24.
Put 8 as the next digit of the answer. 
Result so far: 4776.458
Deduct 576 from 600 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 10:
When dividing 240 by 72, we get 3 with a remainder of 24.
Use 3 as the next digit of our solution. 
Result so far: 4776.4583
If we subtract 216 from 240, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 11:
72 goes into 240 3 times with a remainder of 24.
Put 3 as the next digit of the answer. 
Result so far: 4776.45833
If we take 216 away from 240, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

The final result is 4776.45833 with a remainder of 2.4e-05.